Teng Tools Bits Driver Set 49 PiecesBits Driver Set TT1 49 Pieces. Complete 1 4" drive set featuring a mix of 25 mm and 89 mm hex bits, regular sockets from 4 to 13 mm, and versatile drivers and accessories. Perfect for professional use and organised in a TT1 tool tray module. Key Features: 49 piece 1 4" drive set 25 mm and 89 mm hex bits included Regular sockets from 4 to 13 mm Various drivers and accessories for flexible use Organised in a TT1 tool tray module